python中用graphics模块写温度转换界面

from graphics import *

win = GraphWin("Celsius Converter", 400, 300)          #画出窗口大小
win.setCoords(0.0, 0.0, 3.0, 4.0)                      #把点设置成左下角为（0,0)右上角为(3,d)

Text(Point(1,3),"Celsius Temperature:").draw(win)      #设置文本框
Text(Point(1,1),"Fahrenheit Temperature:").draw(win)
input = Entry(Point(2,3),5)
input.setText("0.0")
input.draw(win)
output = Text(Point(2,1)," ")
output.draw(win)

button = Text(Point(1.5,2.0),"Convert it")
button.draw(win)
Rectangle(Point(1,1.5),Point(2,2.5)).draw(win)

win.getMouse()                                          #鼠标点击
celsius = eval(input.getText())
fahrenheit = 9.0/5.0*celsius + 32.0                     #转换输入

output.setText(fahrenheit)                              #显示输出，改变按钮
button.setText("quit")

win.getMouse()                                          #鼠标点击，退出程序
win.close()